CN110323476A - Fuel cell - Google Patents
Fuel cell Download PDFInfo
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- CN110323476A CN110323476A CN201910187901.9A CN201910187901A CN110323476A CN 110323476 A CN110323476 A CN 110323476A CN 201910187901 A CN201910187901 A CN 201910187901A CN 110323476 A CN110323476 A CN 110323476A
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- groove
- undulating
- undulating groove
- separator
- flow path
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
- H01M8/026—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant characterised by grooves, e.g. their pitch or depth
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
- H01M8/0263—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant having meandering or serpentine paths
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
- H01M8/0265—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant the reactant or coolant channels having varying cross sections
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0267—Collectors; Separators, e.g. bipolar separators; Interconnectors having heating or cooling means, e.g. heaters or coolant flow channels
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
- H01M8/04029—Heat exchange using liquids
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/10—Fuel cells with solid electrolytes
- H01M8/1004—Fuel cells with solid electrolytes characterised by membrane-electrode assemblies [MEA]
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/10—Fuel cells with solid electrolytes
- H01M8/1004—Fuel cells with solid electrolytes characterised by membrane-electrode assemblies [MEA]
- H01M8/1006—Corrugated, curved or wave-shaped MEA
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/241—Grouping of fuel cells, e.g. stacking of fuel cells with solid or matrix-supported electrolytes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/2457—Grouping of fuel cells, e.g. stacking of fuel cells with both reactants being gaseous or vaporised
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/2465—Details of groupings of fuel cells
- H01M8/2483—Details of groupings of fuel cells characterised by internal manifolds
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/10—Fuel cells with solid electrolytes
- H01M2008/1095—Fuel cells with polymeric electrolytes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Abstract
The present invention relates to fuel cells.Fuel cell includes: membrane electrode assembly；With the separator on the side for being disposed in membrane electrode assembly, wherein, separator includes flow path groove, reaction gas is flowed between separator and membrane electrode assembly by flow path groove, flow path groove includes: undulating groove, undulating groove hummock extends in a first direction, and arranges in the second direction orthogonal with first direction；The linear grooves linearly extended in a first direction, undulating groove include: in undulating groove near the first undulating groove of linear grooves positioning；With the second undulating groove, the second undulating groove is reversed in position relative to the first undulating groove with linear grooves, and the amplitude of the first undulating groove is less than the amplitude of the second undulating groove.
Description
Technical field
The present invention relates to a kind of fuel cells.
Background technique
The separator of fuel cell is formed with flow path groove, and reaction gas passes through stream between separator and membrane electrode assembly
The flowing of road groove.One part of the reaction gas flowed in flow path groove is fed into membrane electrode assembly, so that power generation is anti-
It should occur in membrane electrode assembly.For example, separator is formed in Japanese Unexamined Patent Application bulletin the 2014-026960th
There are the undulating groove and linear grooves as flow path groove.
Because undulating groove and linear grooves are in vpg connection difference, in linear grooves and near linear grooves
There are big intervals between undulating groove.If this interval is too big, reaction gas may sufficiently be supplied to film
Electrode assembly, and the power generation performance of fuel cell may deteriorate.
Summary of the invention
It is an object of the present invention to provide a kind of fuel cells of inhibition power generation performance deterioration.
Object above is realized by a kind of fuel cell, which includes: membrane electrode assembly；Be disposed in film
Separator on the side of electrode assembly, wherein separator includes flow path groove, and reaction gas is in separator and membrane electrode assembly
Between by flow path groove flow, flow path groove includes: undulating groove, and undulating groove hummock extends in a first direction, and
And it is arranged in the second direction orthogonal with first direction；The linear grooves linearly extended in a first direction are wavy recessed
Slot includes: in undulating groove near the first undulating groove of linear grooves positioning；It is wavy recessed with the second undulating groove, second
Slot is reversed in position relative to the first undulating groove with linear grooves, and the amplitude of the first undulating groove is wavy less than second recessed
The amplitude of slot.
Because near linear grooves the first undulating groove amplitude less than the amplitude of the second undulating groove, can
Inhibit the increase at the interval between linear grooves and the first undulating groove.Therefore, reaction gas is able to suppress to be not supplied to
Following a part of membrane electrode assembly, which corresponds to the channel part for being spaced increase here, and is able to suppress fuel
The power generation performance of battery deteriorates.
The wavelength of first and second undulating grooves can be mutually the same.
The phase of first and second undulating grooves can be mutually the same.
The wavelength of all undulating grooves can be mutually the same, and the phase of all undulating grooves can phase each other
Together.
Linear grooves can be located at the lower section of undulating groove on gravity direction.
Undulating groove may include third undulating groove, and third undulating groove is wavy relative to the second undulating groove and first
Groove is reversed in position, and the amplitude of the second undulating groove can be less than or equal to the amplitude of third undulating groove.
The amplitude of undulating groove can be smaller closer to linear grooves positioning with undulating groove.
Separator can be the anode spacer part being disposed in the anode-side of membrane electrode assembly.
Effect of the invention
In accordance with the invention it is possible to provide a kind of fuel cell of inhibition power generation performance deterioration.
Detailed description of the invention
Fig. 1 is the exploded perspective view of the single battery of fuel cell；
Fig. 2 is the partial cross section view for the fuel cell that single battery is stacked up；
Fig. 3 A is the enlarged view for illustrating a part of flow path portion of the separator in the present embodiment, and Fig. 3 B is signal
The enlarged view of a part of the flow path portion of the separator in comparative example；And
Fig. 4 A is the enlarged view for illustrating a part of flow path portion of the separator in the first variation example, and Fig. 4 B is to show
The enlarged view of a part of the flow path portion of the separator in the second variation example of anticipating.
Specific embodiment
Fig. 1 is the exploded perspective view of the single battery 2 of fuel cell 1.Fuel cell 1 is by stacking multiple single batteries 2
And it is constructed.Fig. 1 only illustrates a single battery 2, and other single batteries are omitted.Single battery 2 is in Fig. 1
It is stacked in the Z-direction illustrated with other single batteries.Single battery 2 has substantially rectangular shape.The longitudinal direction of single battery 2
Direction and short direction correspond respectively to the Y-direction and X-direction of meaning shown in Fig. 1.
Fuel cell 1 is polymer electrolyte fuel cells, fuel cell-use fuel gas (for example, hydrogen) and oxidant
Gas (for example, oxygen) generates electric power as reaction gas.Single battery 2 includes: film-electrode gas diffusion layer component (MEGA)
10；Support the braced frame 18 of MEGA 10；By the cathode separators 20 being clipped in the middle of MEGA 10 and anode spacer part 40 (under
It is referred to as separator in text).MEGA 10 has cathode gas diffusion layer 16c and anode gas diffusion layer 16a (hereinafter referred to as
Diffusion layer).Braced frame 18 has the shape of substantially frame, and inner circumference side is coupled to the neighboring area of MEGA 10.
Hole c1 to c3 is formed along a side in two short sides of separator 20, and hole c4 to c6 is along another side shape
At.Similarly, hole s1 to s3 is along the formation on one side in two short sides of braced frame 18, and hole s4 to s6 is along another side
It is formed.Similarly, hole a1 to a3 is along the formation on one side in two short sides of separator 40, and hole a4 to a6 is along another side
It is formed.Hole c1, s1 and a1 are interconnected to limit cathode inlet manifold.Similarly, hole c2, s2 and a2 limits coolant inlet discrimination
Pipe.Hole c3, s3 and a3 limit anode export manifold.Hole c4, s4 and a4 limit anode inlet manifold.Hole c5, s5 and a5 limit cold
But agent outlet manifold.Hole c6, s6 and a6 limit cathode outlet manifold.In the fuel cell 1 according to the present embodiment, liquid is cooling
Water is used as coolant.
Separator 40, anode flow portion 40A (hereinafter referred to as flow path portion) is formed in face of the surface of MEGA 10,
Anode inlet manifold is connected to by anode flow portion 40A with anode export manifold, and fuel gas is flowed along anode flow portion 40A
It is dynamic.Separator 20, cathode flow portion 20A (hereinafter referred to as flow path portion), cathode stream are formed in face of the surface of MEGA 10
Road portion 20A is connected to cathode inlet manifold with cathode outlet manifold and oxidant gas is along cathode flow portion 20A flowing.Point
Spacing body 40, opposite with flow path portion 40A surface and separator 20, opposite with flow path portion 20A surface has been respectively formed
Coolant flow path portion 40B and 20B (hereinafter referred to as flow path portion), coolant flow path portion 40B and 20B are by coolant inlet manifold
It is connected to coolant outlet manifold and coolant is flowed along coolant flow path portion 40B and 20B.Flow path portion 20A and 20B is dividing
Extend on the longitudinal direction (Y-direction) of spacing body 20.Similarly, flow path portion 40A and 40B is in the longitudinal direction (side Y of separator 40
To) on extend.Each flow path portion be substantially all in the xy plane be arranged on separator, in the region of MEGA 10.
Separator 20 and 40 is made of the material with gas barrier property and electric conductivity, and is (all by compacting stainless steel, metal
Such as titanium or titanium alloy) and the plate-shaped component of formation.
Fig. 2 is the partial cross section view for the fuel cell 1 that single battery 2 is stacked up.Fig. 2 only illustrates a monomer
Battery 2, and omit other single batteries.Fig. 2 illustrates the section for being orthogonal to Y-direction.
MEGA 10 includes diffusion layer 16a and 16c and membrane electrode assembly (MEA) 11.MEA 11 includes dielectric film 12, and
The anode catalyst layer 14a and cathode catalyst layer respectively formed on a surface of dielectric film 12 and another surface
14c (hereinafter referred to as catalyst layer).Dielectric film 12 is the solid polymerization that high proton conductivity is had under moisture state
Object film, such as fluorine-based amberplex.By coating carbon carrier and tool comprising carrying platinum (Pt) etc. on dielectric film 12
There is the catalyst ink of the ionomer of proton-conducting and catalyst layer 14a and 14c is made.Diffusion layer 16a and 16c are by with gas
Body permeability and conductive material such as porous fibre basic material (such as carbon fiber or graphite fibre) are made.Diffusion layer
16a and 16c is respectively coupled to catalyst layer 14a and 14c.
When observing in the Y direction, each of flow path portion 20A, 20B, 40A and 40B have wavy in cross section
Shape.Specifically, the flow path groove 21 being recessed about flow path portion 20A, separate diffusion layer 16c, and outstanding to diffusion layer 16c,
And the rib 23 being in contact with diffusion layer 16c is arranged alternately in X-direction.Along the internal flow of flow path groove 21
Cathode gas is fed into the catalyst layer 14c of MEA 11 via diffusion layer 16c.In addition, about flow path portion 20B, with diffusion layer
16c is relatively outstanding and divides with the anode for another single battery (not illustrated) for abutting separator 20 in the-z direction
The rib 22 that spacing body is in contact, and be arranged alternately in X-direction far from the flow path groove 24 that this anode spacer part retreats.
Coolant along flow path groove 24 internal flow.Herein, flow path groove 21 and rib 22 on front and rear surface integrally
It is formed, and rib 23 and flow path groove 24 are integrally formed on front and rear surface.Flow path groove 21 and 24 and rib 22 and
23 extend in the Y direction.
Similarly, about flow path portion 40A, far from the diffusion layer 16a flow path groove 41 being recessed and prominent to diffusion layer 16a
And the rib 43 that is in contact with diffusion layer 16a be arranged alternately in X-direction.Along the inside stream of flow path groove 41
Dynamic anodic gas is fed into the catalyst layer 14a of MEA 11 via diffusion layer 16a.In addition, about flow path portion 40B, with expansion
Dissipate that layer 16a be relatively outstanding and yin with another single battery (not illustrated) of separator 40 adjacent in +Z direction
The rib 42 that pole separator is in contact, and the side X is arranged alternately far from the flow path groove 44 that this cathode separators retreats
Upwards.Coolant along flow path groove 44 internal flow.Herein, flow path groove 41 and rib 42 are one on front and rear surface
It is formed to body, and rib 43 and flow path groove 44 are integrally formed on front and rear surface.Flow path groove 41 and 44 and rib
42 and 43 extend in the Y direction.
Fig. 3 A is the enlarged view for illustrating a part of flow path portion 40A of the separator 40 in the present embodiment.Fig. 3 A signal
The groove 411 to 416 of a part as flow path groove 41 and the rib 431 to 435 of a part as rib 43.Groove
411 to 416 are arranged in the X direction with rib 431 to 435.In groove 411 to 416, groove 411 is farthest in the-x direction
From centralized positioning, and groove 416 is in the+x direction farthest away from centralized positioning.Rib 431,432,433,434 and 435 is distinguished
Ground between groove 411 and 412, between groove 412 and 413, between groove 413 and 414, between groove 414 and 415, and
Between groove 415 and 416.
Although groove 411 has linearity configuration, each of groove 412 to 416 all has wave shape.Separately
Outside, in Fig. 1, flow path portion 40A is simply illustrated by straight line.Groove 412 to 416 be hummock extend in the Y direction and
It is disposed in the example of the undulating groove in the X-direction for being orthogonal to Y-direction.Groove 411 is the line linearly extended in the Y direction
One example of property groove.Each of rib 432 to 435 also has wave shape, and in rib 431 and groove 412
Between boundary also there is wave shape.In groove 412 to 416, groove 412 is positioned near groove 411.Groove 412 is
One example of the first undulating groove positioned in groove 412 to 416 near groove 411.It is every in groove 413 to 416
One be the second undulating groove being reversed in position relative to groove 412 and groove 411 an example.
In the exemplary situation that groove 413 is the second undulating groove, any groove 414 to 416 is relative to
One example of the third undulating groove that groove 413 and groove 412 are reversed in position.It is the second undulating groove in groove 414
In one exemplary situation, any groove 415 and 416 is relative to the third wave that groove 414 and groove 412 are reversed in position
One example of shape groove.In the exemplary situation that groove 415 is the second undulating groove, groove 416 is relative to recessed
One example of the third undulating groove that slot 415 and groove 412 are reversed in position.
Spacing interval in the X direction between groove 411 to 416 is roughly the same.Each is with the recessed of wave shape
Slot 412 to 416 all has roughly the same wavelength and roughly the same phase, but has different amplitudes.Specifically, groove
412 to 416 are arranged to the ascending order according to amplitude.In other words, with closer to linear grooves 411, the amplitude of groove
It is smaller.For example, the amplitude A 2 of groove 412 is less than the amplitude A 6 of groove 416 as illustrated in figure 3 a.In addition, in +X direction
The shape of groove that is that upper separate groove 416 positions and not illustrating in figure 3 a is unrestricted.
With reference to Fig. 2, it will provide at least groove 412 to 416 and rib 431 to 435 why be part wave shape master
Want one description in reason.For example, in all flow path grooves 41 and rib 43 of separator 40 and owning for separator 20
Flow path groove 21 and rib 23 are all in linear situation, if the relative position between separator 20 and 40 is in in-plane
On from desired locations shift, then the shape being sandwiched in MEGA 10 between the rib 23 of separator 20 and the rib 43 of separator 40
In state, the position of the rib 23 of separator 20 is shifted from the rib 43 of separator 40 in the X direction.Because MEGA 10 has low
Rigidity, so if in X in the range (for example, 4mm or bigger) of the length of the position of the rib 23 of separator 20 in the Y direction
It is shifted on direction from the rib 43 of separator 40, then MEGA 10 may be bent, so that strong stress is locally subjected to, so that MEA
11 intensity may be decreased.As control, arrived via MEGA 10 in face of the groove 412 each with wave shape
416 and rib 431 to 435 separator 20 flow path groove 21 and each of rib 23 all have linearity configuration or point
Each of flow path groove 21 and rib 23 of spacing body 20 all have phase, amplitude, in terms of be different from groove 412
Into the situation of the wave shape of 416 wave shape, even if the relative position between separator 20 and 40 is as described above
Shifted from desired locations, also inhibit in the range that MEGA 10 is grown in the Y direction by the position of the rib 23 of separator 20
It shifts and is bent from the rib 43 of separator 40 in X-direction.Which suppress the strength reductions of MEA 11.In the present embodiment,
It is every in the flow path groove 21 and rib 23 of groove 412 to 416 and the separator 20 of rib 431 to 435 via MEGA 10
One all has linearity configuration, but they are without being limited thereto.
Fig. 3 B is the enlarged view for illustrating a part of flow path portion 40X of the separator 40x in comparative example.Fig. 3 B couple
It should be in Fig. 3 A.Groove 412x to the 416x and rib 432x to 435x of separator 40x has roughly the same amplitude and wavelength
And phase.Specifically, it anticipates as shown in FIG 3 B, the vibration of each of groove 412x to 415x and rib 432x to 435x
Width is substantially identical as the amplitude A 6x of groove 416x.Herein, in the X direction, in the groove 411 with linearity configuration and most
Interval between the groove 412x with wave shape of groove 411, in other words, the width of rib 431x in the X direction
It is different according to position in the Y direction.Rib 431x has width the best part W1x here.Therefore, rib 431x and
Contact area between diffusion layer 16a increases at the W1x of this part.Therefore, the sun flowed in groove 411 and groove 412x
A part that pole gas may sufficiently be supplied to MEA 11, being positioned along +Z direction far from part W1x.As above
Described, in the situation using the separator 40x in comparative example, anodic gas may sufficiently be supplied to MEA 11
A part, so that power generation performance may deteriorate.
However, the amplitude A 2 near the groove 412 of groove 411 is less than as in the present embodiment for being illustrated in figure 3 a
The amplitude of each of groove 413 to 416.Therefore, in the X direction, the width of rib 431 between groove 411 and 412
The best part W1 is less than above-mentioned part W1x.Therefore, it is able to suppress one that anodic gas is not partly fed to MEA 11
Point, and it is able to suppress power generation performance deterioration.This also suppresses the deteriorations due to the catalyst layer 14a as caused by hydrogen deficient
So as to cause power generation performance deterioration.
Groove 412 to 416 is arranged according to the ascending order of amplitude and according to the ascending order of the distance away from groove 411.
Which suppress the width increase of the rib 432 between the slightly different groove 412 and 413 of amplitude in the X direction.This is equally suitable
For each of rib 433 to 435.As described above, it is suppressed that the width of each of rib 432 to 435 in the X direction
Thus anodic gas is equably supplied to MEA 11 by the increase of degree.
In addition, if amplitude difference is big as in comparative example between groove 411 and 412x, then in groove
The difference of anode-gas-pressure loss between 411 and 412x can increase, so that anodic gas may be not supplied to MEA
11 a part.In the present embodiment, it because the amplitude A 2 of groove 412 is less than the amplitude A 2x of groove 412x, inhibits
The increase of anode-gas-pressure loss difference between groove 411 and 412.Which suppress anodic gas to be not supplied to MEA 11
A part, which suppress power generation performance deteriorations.Additionally, it is suppressed that the anode-gas-pressure damage between groove 412 and 413
Lose the increase of difference.This is equally applicable to groove 413 to 416.Therefore anodic gas equably can be supplied to MEA 11.
In addition, coolant is flowed by flow path groove 44 as described above, flow path groove 44 is formed on the rear side of rib 43
It is dynamic.Therefore, which forms on the rear side of rib 431 and 432, and is formed and rib 431 and 432
Same shape.Therefore the coolant being able to suppress between the flow path groove 44 formed on the rear side of rib 431 and 432
The increase of pressure loss difference.Therefore be able to suppress due to coolant almost without flow through part and keep MEA 11 partly not cold
But, and power generation performance is inhibited to deteriorate.This is equally applicable between the flow path groove 44 on the rear side of rib 433 to 435
The pressure loss of coolant.Therefore, MEA 11 is uniformly cooled.
In addition, in from groove 412x to the region of groove 416x, being suppressed about the separator 40x in comparative example
The elongation of basic material can increase in processing, and yield rate may be decreased.In the present embodiment, because in groove 412
Amplitude gradually changes between to 416, so can inhibit stretching for basic material into the region of groove 416 from groove 412
Long rate increases, and yield rate is inhibited to reduce.
The separation further, since shape difference between groove 411 and groove 412x near it, in comparative example
Part 40x may be subjected to big residual stress in press process.This residual stress may cause warpage in separator 40x.
In the present embodiment, groove 416 to 412 according to amplitude decline order, in other words, according to the similarity order with linearity configuration
Arrangement.Therefore it can reduce the residual stress in press process, and reduce a possibility that warpage occurs in separator 40.
It is contemplated that ground, fuel cell 1 in the present embodiment be used in such posture, it is recessed in the posture
Slot 411 is located at the lower section of groove 412 to 416 on gravity direction, so that -X direction is downward gravity direction.In this respect
In, for example, because groove 411 has linearity configuration, also pressing down even if the water generated on the anode side flows into groove 411
Water retention is made in groove 411, and the anodic gas flowed in groove 411 allows water flowing to downstream side.With this side
Formula, drainage are improved.Even if X-direction relative in the inclined posture of gravity direction use fuel cell 1 situation in,
Water retention is also inhibited in groove 411 and ensures drainage, as long as groove 411 is located at groove 412 on gravity direction
To 416 lower sections.
Then, variation example will be described.In variation example, identical appended drawing reference is endowed and those of above-described embodiment phase
Same component, and omit duplicate explanation.Fig. 4 A be shown in separator 40a in the first variation example flow path portion 40Aa one
Partial enlarged view.Flow path portion 40Aa includes having the groove 411 of linearity configuration and each recessed with wave shape
Slot 412a to 416a.Groove 412a to 416a has roughly the same wavelength and roughly the same phase.Groove 413a to 416a
With roughly the same amplitude, for example, as illustrated in Figure 4 A, each of groove 413a to 415a amplitude and groove
The amplitude A 6a of 416a is identical.In the exemplary situation that groove 413a is the second undulating groove, any groove 414a is arrived
416a is an example of third undulating groove.In this variation example, the amplitude and third of the second undulating groove are wavy recessed
The amplitude of slot is identical.As control, the amplitude A 2a of an exemplary groove 412a as the first undulating groove is less than groove
Each of 413a to 416a amplitude.Even if in such configuration, being also able to suppress between groove 411 and 412a in the side X
The width of upward rib 431a increases, and anodic gas is inhibited to be not supplied to a part of MEA 11.Which suppress hairs
Electrical property deterioration.Due to the above-mentioned shape of groove 412a to 416a, the width of rib 432a in the X direction is according in the Y direction
Position and change, but in the Y direction, each width of rib 433a to 435a in the X direction is constant.
In addition, groove 413a to 416a has essentially identical wavelength, identical phase, identical amplitude and common shape
Shape.Here, for typically for compacting, the shape of the metal plate formed by mold is not always identical as the reverse shape of mold.
After metal plate is by die deformation, due to the elasticity of metal plate, the shape of metal plate slightly become it before molding just
Beginning shape.This, which is referred to as, springs back.Therefore, when designing mold, this rebound is contemplated.It is different from each other in groove shapes
In situation, it may be necessary to design mold for the groove shapes of difference, and design mold to occupy the long time.In this implementation
In example, groove has common shape.Therefore it is able to suppress the long-time of design mold requirement.Fuel is used for being formed to be similar to
In the situation of the accurate shape of the separator of battery, several times with different mold compactings by metal plate, so that metal plate is gradually
Extension is to realize final products shape.In the situation different from each other of the wave shape in final products shape, make in compacting
The design of mold is different, so that designing the time of mold requirement may further extend.On the other hand, in this reality
Further groove 413a a to 416a is applied with common shape.Therefore common shape can be formed in the mold for compacting,
And the time for inhibiting the mold designed for production separator 40a to require extends.
Fig. 4 B is the enlarged view for illustrating a part of flow path portion 40Ab of the separator 40b in the second variation example.It is located at
The amplitude of groove 413b between groove 412a and 414a is substantially identical as the amplitude of groove 412a.Therefore, in the Y direction, position
The width of rib 432b in the X direction between groove 412a and 413b is constant.As control, because in groove
There are amplitude differences between 413b and 414a, so having the maximum width of the rib 433b between groove 413b and 414a
Part W3b width be greater than the width of rib 432b in the X direction.The width of part W3b is substantially and with rib 431a's
The part W1a's of maximum width is of same size.By this method, width here increased part W1a and W3b via groove
412a, rib 432b and groove 413b are in the X direction away from each other.Therefore, if two parts with are via a groove
Situation adjacent to each other compares, and it is adjacent to each other to be able to suppress the part that anodic gas is relatively difficult to be supplied to, and can
Anodic gas is equably supplied to MEA 11.
Flow path groove in the present embodiment and above-mentioned variation example can be applied to cathode separators.
Liquid is used to cool down in fuel cell 1 as the water of coolant although separator 40,40a and 40e are employed in,
It is that they are without being limited thereto, and can use in the cooling fuel cell of air for using air as coolant.
Above-mentioned undulating groove can have sinusoidal waveform, or the wave shape with straight line and circular arc.
In above-described embodiment and variation example, undulating groove has roughly the same wavelength and roughly the same phase, but
It is that they are without being limited thereto.In any case, can inhibit linear grooves and near linear grooves undulating groove it
Between interval increase, as long as near linear grooves undulating groove amplitude be less than other undulating grooves amplitude, it is described its
Its undulating groove is the groove being reversed in position relative to the undulating groove near linear grooves and linear grooves.This
Outside, in above-described embodiment and variation example, undulating groove and linear grooves are formed with roughly the same spacing interval, but they
It is without being limited thereto.
Although some embodiments of the present invention are described in detail, the present invention is not limited to specific embodiments, but
It can change or change in the range of claimed invention.
Claims (8)
1. a kind of fuel cell, comprising:
Membrane electrode assembly；With
Separator, the separator are disposed on the side of the membrane electrode assembly,
Wherein
The separator includes flow path groove, and reaction gas passes through the stream between the separator and the membrane electrode assembly
The flowing of road groove,
The flow path groove includes:
Undulating groove, the undulating groove hummock extend in a first direction, and orthogonal with the first direction
It is arranged on two directions；With
Linear grooves, the linear grooves linearly extend in said first direction,
The undulating groove includes:
Near the first undulating groove of linear grooves positioning in the undulating groove；With
Second undulating groove, second undulating groove are fixed on the contrary relative to first undulating groove and the linear grooves
Position, and
The amplitude of first undulating groove is less than the amplitude of second undulating groove.
2. fuel cell according to claim 1, wherein the wave of first undulating groove and second undulating groove
Length is mutually the same.
3. fuel cell according to claim 2, wherein the phase of first undulating groove and second undulating groove
Position is mutually the same.
4. according to claim 1 to fuel cell described in any one of 3, in which:
The wavelength of all undulating grooves is mutually the same, and
The phase of all undulating grooves is mutually the same.
5. according to claim 1 to fuel cell described in any one of 4, wherein the linear grooves are on gravity direction
Positioned at the lower section of the undulating groove.
6. according to claim 1 to fuel cell described in any one of 5, in which:
The undulating groove includes third undulating groove, the third undulating groove relative to second undulating groove with it is described
First undulating groove is reversed in position, and
The amplitude of second undulating groove is less than or equal to the amplitude of the third undulating groove.
7. according to claim 1 to fuel cell described in any one of 6, wherein the amplitude of the undulating groove is with institute
Undulating groove is stated to position closer to the linear grooves and smaller.
8. according to claim 1 to fuel cell described in any one of 7, wherein the separator be disposed in it is described
Anode spacer part in the anode-side of membrane electrode assembly.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018-063275 | 2018-03-28 | ||
| JP2018063275A JP6874724B2 (en) | 2018-03-28 | 2018-03-28 | Fuel cell |
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| Publication Number | Publication Date |
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| CN110323476A true CN110323476A (en) | 2019-10-11 |
| CN110323476B CN110323476B (en) | 2022-07-12 |
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| Country | Link |
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| US (1) | US10826084B2 (en) |
| JP (1) | JP6874724B2 (en) |
| CN (1) | CN110323476B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3079676B1 (en) * | 2018-03-27 | 2022-01-07 | Symbiofcell | BIPOLAR PLATE WITH WAVY CHANNELS |
| JP7323379B2 (en) * | 2019-08-21 | 2023-08-08 | 株式会社Soken | Fuel cell separator and fuel cell |
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Also Published As
| Publication number | Publication date |
|---|---|
| US10826084B2 (en) | 2020-11-03 |
| JP6874724B2 (en) | 2021-05-19 |
| JP2019175713A (en) | 2019-10-10 |
| US20190305327A1 (en) | 2019-10-03 |
| DE102019105669A1 (en) | 2019-10-02 |
| CN110323476B (en) | 2022-07-12 |
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